<template>
    <div class="cart">
        <div class="cart_mask" v-if="showCartProduct"></div>
        <div class="cart_product" v-if="showCartProduct">
            <div class="cart_product_header" v-if="showCartProduct">
                <div class="cart_product_header_allChecked">
                    <input type="checkbox" class="circle-checkbox" :checked="allChecked" @change="toggleAllChecked"> 全选
                </div>
                <div class="cart_product_header_clear" @click="clearCart">清空购物车</div>
            </div>
            <div class="cart_product_list">
                <div class="cart_product_list_item" v-for="item in shop" :key="item.id">
                    <div class="checkbox">
                        <input type="checkbox" class="circle-checkbox" :checked="item.checked"
                            @change="changeChecked(item)" :name="item.title" :id="item.id">
                    </div>
                    <div class="content">
                        <Product min="min" :category="item" />
                    </div>
                </div>
            </div>
        </div>
        <div class="cart_check">
            <div class="cart_check_icon">
                <img src="http://www.dell-lee.com/imgs/vue3/basket.png" alt="" @click="toggleCartList">
                <span class="tag">{{ number }}</span>
            </div>
            <div class="cart_check_empty" v-if="list.length === 0">购物车是空的</div>
            <div class="cart_check_content" v-else>
                <div class="cart_check_content_total_price">总计 :
                    <span class="check_content_total_price_number">{{ price }}</span>
                </div>
                <div class="cart_check_content_submit" @click="handleCheckout">结算</div>
            </div>
        </div>
    </div>
</template>

<script setup>
import { ref, computed,watchEffect } from 'vue';
import Product from './Product.vue';
import { useUserStore } from '../store/shop';
import { useRouter } from 'vue-router';

const router = useRouter();
const store = useUserStore();
const props = defineProps(['category', 'shopInfo']);

const list = ref(props.category);
const shop = ref([]);

const number = computed(() => list.value.reduce((total, item) => total + item.number, 0));
const price = computed(() => list.value.reduce((total, item) => total + item.number * item.price, 0).toFixed(2));
const showCartProduct = ref(false);
const allChecked = computed({
    get: () => list.value.every(item => item.checked),
    set: (value) => list.value.forEach(item => item.checked = value),
});

const toggleCartList = () => showCartProduct.value = !showCartProduct.value;
const changeChecked = (item) => {
    item.checked = !item.checked;
    item.number = item.checked ? item.number : 0;
    const index = shop.value.findIndex(i => i.id === item.id);
    index !== -1 ? shop.value.splice(index, 1) : shop.value.push(item);
};
const clearCart = () => list.value.forEach(item => { item.checked = false; item.number = 0; });
const toggleAllChecked = () => allChecked.value = !allChecked.value;

const handleCheckout = () => {
    router.push({
        path: '/orderconfirmationview',
        query: {
            shops: JSON.stringify(shop.value),
            number: number.value,
            price: price.value,
            shopInfo: JSON.stringify(props.shopInfo),
        },
    });
};
//选中的商品
watchEffect(() => {
    const lists = store.nearbyList
        .flatMap(item => item.category)
        .flatMap(item => item.list)
        .filter(item => item.number > 0);
    shop.value = lists
    console.log(shop.value);
});
</script>

<style lang="scss" scoped>
@import "../style/viriables.scss";

.cart {
    &_mask {
        position: absolute;
        top: 0;
        bottom: .5rem;
        left: 0;
        right: 0;
        background-color: rgba($color: #000000, $alpha: .4);
    }

    &_product {
        width: 100%;
        position: absolute;
        left: 0;
        bottom: .5rem;
        background-color: $bgColor;

        //圆形复选框
        /* 设置选中背景 */
        .circle-checkbox:checked {
            background: #1673ff;
        }

        /* 设置复选框样式 */
        .circle-checkbox {
            width: .2rem;
            height: .2rem;
            background-color: #ffffff;
            border: solid 1px $light-fontColor;
            -webkit-border-radius: 50%;
            border-radius: 50%;
            font-size: 0.8rem;
            margin: 0;
            padding: 0;
            position: relative;
            display: inline-block;
            vertical-align: top;
            cursor: default;
            // -webkit-appearance: none;
            -webkit-user-select: none;
            user-select: none;
        }

        /* 设置伪类，即显现的对勾样式 */
        .circle-checkbox:checked::after {
            content: "";
            top: 5px;
            left: 4px;
            position: absolute;
            background: transparent;
            border: #fff solid 2px;
            border-top: none;
            border-right: none;
            height: 3px;
            width: 8px;
            -moz-transform: rotate(-45deg);
            -ms-transform: rotate(-45deg);
            -webkit-transform: rotate(-45deg);
            transform: rotate(-45deg);
        }

        &_header {
            padding: .18rem;
            display: flex;
            justify-content: space-between;
        }

        &_list {
            max-height: 3rem;
            overflow-y: scroll;

            &_item {
                display: flex;

                .checkbox {
                    display: flex;
                    align-items: center;
                    margin-left: .18rem;
                }

                .content {
                    flex: 1;
                    width: 100%;
                }
            }
        }
    }

    &_check {
        width: 100%;
        height: .49rem;
        border-top: .01rem solid $content-bgColor;
        position: absolute;
        left: 0;
        bottom: 0;
        display: flex;

        // 购物车图标
        &_icon {
            width: .84rem;
            height: .49rem;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;

            img {
                width: .28rem;
                height: .26rem;
            }

            .tag {
                display: inline-block;
                width: .15rem;
                height: .15rem;
                border-radius: 50%;
                background-color: $hightlight-fontColor;
                color: $bgColor;
                font-size: .1rem;
                text-align: center;
                position: absolute;
                top: .05rem;
                right: .18rem;
            }

        }

        // 空购物车
        &_empty {
            line-height: .49rem;
        }

        // 总价
        &_content {
            flex: 1;
            display: flex;
            position: relative;
            width: 100%;

            &_total_price {
                flex: 1;
                line-height: .49rem;
                color: $hightlight-fontColor;

                &_number {
                    font-size: .18rem;
                }
            }

            &_submit {
                width: .98rem;
                height: .49rem;
                background-color: $btn-bgColor;
                color: $bgColor;
                text-align: center;
                line-height: .49rem;
            }
        }
    }
}
</style>